Recently replaced broken Canon MP480 printer with a later model Canon MG5660 printer. Although the XP OS now sees it as the new default printer, Thunderbird does not. I click print and it goes to the MP480 unless I pay attention and change the printer selected each time. Invariably I wait for the print whist the print dialogue waits for me and I waste time. It must be simple but I can't find the option to change the default printer. Frustrating! Can someone please help.